Change has to come from us. That's why I always argue with my friends. Leaders are not the real problem. They are just a reflection of our society.
You need to ask yourself before begging for change from the government. When you were (are) in Nepal, did you follow all the traffic/pedestrian signs? Did you or your relative refuse to give "ghus" even though you are in dire condition?
I can't count officially but I can guess only handful of sajha member or their relative have taken or given "ghus" in their life time. What have you done anything to stop that? Did you atleast argue with your parents for that?
Are you teaching your children to be good and responsible citizen rather than successful citizen?. I am sure you guys grew up by hearing the sentence "yo choro ta chalak cha. yesle bhabisya ma kei pragati garcha?" . Well yeah of course he will mostly end up growing with cheating & screwing people and may become a rich person. Nepalese people somehow appreciate for being "chalak". But is that what you want?
When you were in Nepal or visiting Nepal, did you litter? or asked someone to stop littering? Did you ever argue with parents for intercaste marriage or even talk about it? These are extremely basic questions which you should ask to yourself before pointing finger to the government because when you point a finger to the government you are pointing finger to yourself. These simple steps sounds very basic but they are fundamental things for a developed society.

My point is you don't have to involve in development of the country directly or be a leader. First make a better & honest person. Country is nothing but a bunch of people or societies. It's never too late to make a better human being.